I think its C because America enters the war when German started sinking there merchants ships.
Answer:
I believe that was Ivan III of Russia. I hope this helps :)
The American Red Cross would have provided the greatest opportunity.
Over 22.000 Red Cross nurses were enrolled to support the armed forces medical corps.
As well, several thousand women volunteers worked overseas in a variety of jobs aside from nursing like nurses'aides, canteen workers and support workers helping sort and distribute Red Cross parcels destined for the troops.
Answer:
The Black Death
Explanation:
The Black Death bascially destroyed Europe, being a fatal disease. The reason why it was so deadly though was because of how fast it spread. Animals like rats first got the disease, then it spread to humans. The diease spread so quickly was because back then the towns were dirty and crowded, which rats often lived in, which caused rats to make common contact with humans.
Hope this helps! :)